It is a special substance that helps to filter water. It has a white fine powder. It needs to be used in conjunction with a fabric filter tank.
The filtered powder is coated with a filter plate, allowing for more fine filtering properties.
After being used for a period of time, the filter powder will be arranged by looking at the pressure of the filter tank which is around 15-20 pounds per square inch. The filter tank must be washed with the amount of filter powder used up. Depends on the model and size of the filter tank
Can filter about 5 micron